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LOGKr, No. 323,049'. Patented July 28, 1885.

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UNITED STATES ATENT .Erica CHARLES A. LUDLOV, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR OF ONE-HALF TO WALTER LIPE, OF NEW YORK, N. Y.

LOCK.

SPECIFICATION forming part of Letters Patent No. 323,049, dated July 28, 1885.

Application tiled March 13, 1885.

To all whom it may concern.-

Be it known that I, CHARLEs A. LUDLow, of Bridgeport, in the county of Fairfield and State of Connecticut, have invented a new and useful Improvement in Locks, of which the following is a specification.

Although my invention is more particularly intended for locks having two bolts which are projected in opposite directions beyond the lock case in the operation of locking, and which may be inserted in the rail between two drawers of a bureau or desk, the two bolts being adapted to engage with the bottom of the drawer above the rail and with the top of the drawer below the rail, certain features of the invention may also be embodied in locks having but a single bolt.

Certain features of the invention are applicable to a lock, whatever be the forni of case; but there are features of the invention relating particularly to the construction of a case of approximately cylindric form and adapted to be inserted into an auger-hole bored for its reception. l

The invention consists in novel combinations of parts, and in details of construction, which are illustrated in the accompanying' drawings, and hereinafter described, and pointed out in the claims.

In the drawings, Figurel is an elevation of a lock embodying my invention, the bolts being projected into locking position. Fig. 2 is an elevation in a plane atright'angles, Fig. l. Fig. Sis a sectional View of the lock, showing only the case, the bolts, and the cam or hub for operating them. Fig. 4 represents a View of the lock, a part of the case being opened or in an incomplete state to illustrate the operating mechanism. Fig. 5 is a sectional view on the plane of the dotted line x x, Fig. l. Fig. 6 represents a blank which forms the principal part of the case; Fig. 7, a plan of the head or disk which completes the case; and Fig. S is a sectional elevation or portion of two drawers, one above another, and the meeting-rail, in which my improved lock is arranged between the drawers.

For the sake of clearness, the drawings are made upon an enlarged scale, and similar letters of reference designate corresponding parts in all the figures.

The lock-case consists, essentially, of two (Model.)

heads, disks, or circular portions, A'A, and a portion of rectangular or oblong transverse section extending between them. l

The manner of forming this case will be understood most clearly from Figs. 6 and 7, taken in connection with the other views of the drawings representing a finished ease. The blank shown in Fig. 6 is punched out by suitable dies from sheet metal, and consists of a head or disk portion, A, having at opposite sides wings or portions A2 connected with it by necks a. In Fig. 7 I have shown the opposite head or disk portion, A, which completes the case.

To form the case from the blank shown in Fig. 6, the portions A2 A2 are bent into positions at right angles to the disk A by folding upon the dotted lines extending through the necks a, and the portions A2 are then bent upon the dotted lines a so that they combine to form the rectangular portion of the lock-case, which is represented in Fig. 5. The portions AI have at their outer edges tongues a', and in the head or disk A are mortises a2. After the portions A2 have been bent, as described, the head A is applied thereto, the mortises a2 receiving the tongues a', and the tongues are then riveted over to secure the head Ain place. The head A, which is smaller in diameter than the head A', is likewise provided with tongues a3, projecting on opposite sides thereof, and before the lock is completed these tongues are bent into position at right angles to the head A, as shown in Figs. l to 4, inclusive.

In Fig. 8 I haverepresentedportions of upper and lower drawers, B B', between which K is a meeting-rail, B2, and I have represented my improved lock as secured in a hole, b, bored through this meeting-rail. The hole b is of a diameter to receivethrough it the head A,and the head A overlaps the rail at the top, or may be slightly countersunk thereinto. After the lock has been thus inserted into the rail B2 the tongues a are bent outward into the position shown in Fig. 8, in which position they overlap the under side of the rail and thereby secure the lock in place.

I will now describe the internal mechanism of the lock, which may be employed in a case of any other construction than that here shown.

C C designate bolts, capable of working IOO through the mortises c in the heads A A and shooting in opposite directions. These bolts have lugs or ears c', which project upward from the plane of the bolts, and which are clearly shown in Figs. 3 and 4.

D designates the cam or hub whereby the bolts are operated, and which has a central hole, d, of square or other form, with which a key may be engaged to turn it. remark that in opposite edges of the portions A2 of the case are semicircular notches a,

' which, when the parts ofthe case are folded,

as described, combine to form holes in the opposite sides of the case for the insertion of a key, such holes being clearly shown in Fig. 5. The bolts C rest against one flat face of the case, and the cam or hub D overlies the bolts, and has radial projections or teeth d, which enter the spaces between the lugs or ears c of the bolts, and by engagement with these lugs or ears shoot outor retract the bolts. Overlying the cam or hub D is a bolt-tumbler, E, the form of which is best shown in Fig. 4. This tumbler E has acentral opening, e, to en'- able the key to be inserted into engagement with the cam or hub D. The tumbler E has at one side an incline, e', forming a.projection, e2, and this tumbler isl in the same horizontal plane with the lugs or ears c,projecting from one of the bolts C, as shown in Figs. 4 and 5. Against the opposite side of the tumbler bears a spring, F, consisting of a folded or doubled strip of steel, one member or arm of which bears against the inner side of the case, while the other member or arm bears against the side of the tumbler E. This spring is shown best in Figs. 4 and 5, and tends to press the tumbler toward the opposite side of the case and hold the projection e2 in range with the ears c in the bolts C.

As represented in Figs. 3 and 4, the bolts are shot outward, and when in such position they engagewith slots or keepers b* in the drawers B B', as shown in Fig. 8, and so hold both drawers closed. When a key is engaged with the hub or cam D, the latter, by its turning movement, draws in the bolts, and one of the ears c is caused to act on the incline e', and to pass that incline and to come against the projecting portion e2 of the tumbler E. To enable the bolt to so move, the tumbler is shifted or moved toward the right in Fig. 4, and thereby the spring F is compressed or put under tension. When the bolts are in the outward position shown in Fig. 4, the tumbler E is pressed toward the left, as 4there shown, and the incline e offers a resistance to the inward movement of the bolt. When the bolts have been moved inward, the tumbler E is pushed toward the right by the ear c', bearing on the incline e' and the spring F is thus compressed or put under tension. The bolt in its inward movement is carried far enough to bring one V ear c' against the ilat projection e2 of the tumbler, and the pressure which the spring F now exerts on the tumbler E toward the left I would here t offers a resistance to the outward movement of the bolts.

I am awarev that it is not new to provide a single bolt in a lock with projections on its face, and to employ for operating the bolt a rotary lock cam or hub overlying the bolt and engaging with its projections. This I do not claim, broadly, as of my invention. I desire to limit this feature of my invention to locks having two bolts moving in opposite directions and provided at their outer edges, which are most distant from each other, with projections on their faces, in combination with a cam or hub having its axis between the two bolts and overlying them both. This combination of parts enables me to arrange ,the two bolts in a very narrow case and to employ a cam or hub of large diameter, and which will therefore be strong and not liable to break or wear out.

What I claim as my invention, and desire to secure by Letters Patent, is-

1. In a lock, the combination, with two bolts, G, provided with lugs or ears c', extending from their faces near those edges which are outermost or most distant from each other, of the lock cam or hub D, overlying the bolts and provided with projections or teeth engaging with said lugs or ears to operate the bolts, and a tumbler for holding the bolts after operation by the said cam or hub, substantially as herein described.

2. In a lock, the combination, with a bolt or bolts provided with projecting lugs or ears, of a cam or hub engaged with said lugs or ears to operate the bolt or bolts, a tumbler, E, consisting of a plate overlying the cam or hub and provided with an incline and projection with which one of the lugs or ears engages, and a spring acting against the edge of the tumbler and serving to hold the incline and projection thereof in engagement with the lug or ear, substantially as herein described. 3. In a lock-case, the combination of a head or disk, A, and portions A2, connected with the head or disk by necks a, the same being bent at the necks a and along the dotted lines ci, and a head or disk, A', provided with mortises a2 for the reception of tongues a upon the parts A2, and lsecuring devices for holding the lock in place, substantially as herein described.

4.. In a lock-case, the combination of the head A, provided with tongues a3, projecting beyond the edge thereof, and portions A, united by necks a with the head A, the same being bent at the necks a and along the dotted lines a and the head A', larger in diameter than the head A and provided with mortises a.2 for the reception of tongues a on the parts A2, the tongues a3 serving to secure the lock in place, substantially as herein described.

GHAS. A. LUDLOW. Witnesses:

WALTER LIPE, C. HALL.

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